CN110932577A - Three-phase AC-DC conversion power supply - Google Patents
Three-phase AC-DC conversion power supply Download PDFInfo
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- CN110932577A CN110932577A CN201911317001.8A CN201911317001A CN110932577A CN 110932577 A CN110932577 A CN 110932577A CN 201911317001 A CN201911317001 A CN 201911317001A CN 110932577 A CN110932577 A CN 110932577A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4258—Arrangements for improving power factor of AC input using a single converter stage both for correction of AC input power factor and generation of a regulated and galvanically isolated DC output voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a three-phase alternating current-direct current conversion power supply which comprises a three-phase alternating current input end, a primary-side matrix type switching circuit, an isolation transformer, a secondary-side rectifying circuit and a direct current output end which are connected in sequence, wherein the primary-side matrix type switching circuit comprises a primary-side first upper bridge arm, a primary-side first lower bridge arm, a primary-side second upper bridge arm, a primary-side second bridge arm, a primary-side third upper bridge arm and a primary-side third lower bridge arm which are formed by reversely connecting two switching tubes in series; the conversion power supply adopts a single-stage structure, and can remove a large-capacity direct-current capacitor between the rectifier and the direct-current-direct-current converter, so that the volume and the weight of the whole conversion power supply are effectively reduced, and the power density of the conversion power supply is improved.
Description
Technical Field
The invention relates to the technical field of rectification power supplies, in particular to a three-phase alternating current-direct current conversion power supply.
Background
The alternating current-direct current conversion power supply is widely applied to various industrial occasions such as a communication equipment power supply rectifier module, a battery energy storage rectifier module, an electric automobile power battery charging pile and the like, and has the main functions of realizing power factor correction of an alternating current power grid side, reducing pollution of harmonic waves to the power quality of a power grid and reducing reactive loss; and simultaneously, stable and controllable direct current electric energy is provided for the rear-stage electric equipment. At present, a power supply used in a communication equipment power supply module and an electric vehicle charging pile module generally adopts a two-stage structure, namely, a first stage is a three-phase alternating current-direct current rectifier bridge, the main functions of the power supply are to realize power factor correction and improve direct current voltage, a second stage is a high-frequency isolation type direct current-direct current converter, and the main functions of the power supply are to isolate and control output voltage. The two stages are connected through a large-capacitance value direct current capacitor, and the capacitor plays a role in voltage stabilization and decoupling. The most outstanding problems of the structure are that: the volume and weight of the two-stage structure are too large, resulting in low power density; meanwhile, the high loss caused by the two-stage structure can also reduce the conversion efficiency of the whole machine, and the waste of electric energy is caused.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the prior art, and provides a three-phase alternating current-direct current conversion power supply, which can effectively reduce the volume and the weight of the conversion power supply, improve the power density of the conversion power supply, prolong the service life of a system, and reduce the maintenance and replacement cost.
A three-phase ac-dc conversion power supply according to an embodiment of a first aspect of the present invention includes:
the three-phase alternating current input end comprises an A alternating current input end, a B alternating current input end and a C alternating current input end;
the primary side matrix type switch circuit comprises a primary side first bridge arm branch, a primary side second bridge arm branch and a primary side third bridge arm branch which are connected in parallel, wherein the primary side first bridge arm branch comprises a primary side first upper bridge arm and a primary side first lower bridge arm which are connected in series, and the A-shaped alternating current input end is connected to the connecting point of the primary side first upper bridge arm and the primary side first lower bridge arm; the primary side second bridge arm branch comprises a primary side second upper bridge arm and a primary side second bridge arm which are connected in series, and the B-phase alternating current input end is connected to the connecting point of the primary side second upper bridge and the primary side second lower bridge arm; the primary side third bridge arm branch comprises a primary side third upper bridge arm and a primary side third lower bridge arm which are connected in series, and the C alternating current input end is connected to the connecting point of the primary side third upper bridge and the primary side third lower bridge arm; the primary side first upper bridge, the primary side first lower bridge arm, the primary side second upper bridge, the primary side second lower bridge arm, the primary side third upper bridge and the primary side third lower bridge arm are all formed by reversely connecting two switching tubes in series;
two ends of a primary winding of the isolation transformer are respectively connected to two parallel connection points of the primary first bridge arm branch, the primary second bridge arm branch and the primary third bridge arm branch;
and the secondary rectifying circuit is used for rectifying the electric energy transmitted by the isolation transformer, the input end of the secondary rectifying circuit is connected with the secondary winding of the isolation transformer, and the output end of the secondary rectifying circuit is led out to be used as a direct current output end.
The three-phase alternating current-direct current conversion power supply according to the embodiment of the first aspect of the invention has at least the following beneficial effects: the conversion power supply adopts a single-stage structure, a large-capacity direct-current capacitor between a rectifier and a direct-current-direct-current converter can be removed, the size and the weight of the whole conversion power supply are effectively reduced, the power density of the conversion power supply is improved, in addition, in the traditional alternating-current-direct-current conversion power supply, the service life of the large-capacity direct-current capacitor is short, the component is a short plate of the whole conversion power supply service life, the service life of a system can be effectively prolonged by removing the large-capacity direct-current capacitor, and the maintenance and replacement cost is reduced.
According to some embodiments of the present invention, the secondary rectifier circuit is a full-bridge rectifier circuit, and includes a secondary first bridge arm branch and a secondary second bridge arm branch which are connected in parallel, where the secondary first bridge arm branch includes a secondary first upper bridge arm and a secondary first lower bridge arm which are connected in series, the secondary second bridge arm branch includes a secondary second upper bridge arm and a secondary second lower bridge arm which are connected in series, and two ends of a secondary winding of the isolation transformer are respectively connected to a connection point of the secondary first upper bridge arm and the secondary first lower bridge arm and a connection point of the secondary second upper bridge arm and the secondary second lower bridge arm; the direct current output end is respectively connected to two parallel connection points of the secondary side first bridge arm branch and the secondary side second bridge arm branch.
According to some embodiments of the invention, the secondary side first upper bridge arm, the secondary side first lower bridge arm, the secondary side second upper bridge arm and the secondary side second lower bridge arm each comprise a plurality of switching tubes connected in parallel with each other. The secondary rectification circuit adopts a mode that a plurality of switching tubes are connected in parallel, so that the conduction loss of the secondary rectification circuit can be effectively reduced, and the conversion efficiency of the system is improved.
According to some embodiments of the present invention, a three-phase filter inductor and a three-phase filter capacitor are further disposed between the three-phase ac input terminal and the primary side matrix switch circuit, the three-phase filter inductor includes an a-phase filter inductor, a B-phase filter inductor, and a C-phase filter inductor, the a-phase filter inductor is connected in series between a connection point of the primary side first upper bridge and the primary side first lower bridge arm and the a-phase ac input terminal, the B-phase filter inductor is connected in series between a connection point of the primary side second upper bridge and the primary side second lower bridge arm and the B-phase ac input terminal, the C-phase filter inductor is connected in series between a connection point of the primary side third upper bridge and the primary side third lower bridge arm and the C-phase ac input terminal, the three-phase filter capacitor is composed of three capacitors connected in a delta connection or star connection, and three ports of the three-phase filter capacitor are respectively connected to a connection point of the primary A point, a connection point of the primary second upper bridge and the primary second lower bridge arm, and a connection point of the primary third upper bridge and the primary third lower bridge arm.
According to some embodiments of the present invention, the dc filter circuit is disposed between the secondary rectification circuit and the dc output terminal, and includes an output dc inductor and an output dc capacitor, one output terminal of the secondary rectification circuit is connected to one end of the output dc inductor, the other end of the output dc inductor is connected to one end of the output dc capacitor, the other output terminal of the secondary rectification circuit is connected to the other end of the output dc capacitor, and two ends of the output dc capacitor are led out as dc output terminals.
According to some embodiments of the present invention, the secondary side rectifying circuit further comprises an additional output dc capacitor disposed between the secondary side rectifying circuit and the dc filter circuit, and two ends of the additional output dc capacitor are connected to two output ends of the secondary side rectifying circuit. By arranging the additional output direct current capacitor, the output voltage range of the three-phase alternating current-direct current conversion power supply can be widened.
According to some embodiments of the present invention, the switching tubes in the primary matrix switching circuit are IGBT tubes or MOSFET tubes.
According to some embodiments of the present invention, the switching tube in the secondary rectification circuit is a MOSFET tube.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a system structure diagram of a three-phase ac-dc conversion power supply according to an embodiment of the present invention;
fig. 2 is a structural diagram of a primary-side matrix switch circuit of a three-phase ac-dc conversion power supply according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a primary matrix switch circuit of a three-phase ac-dc conversion power supply according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a three-phase ac-dc conversion power supply according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a three-phase ac-dc conversion power supply according to an embodiment of the present invention includes a three-phase ac input terminal, a primary-side matrix switch circuit, an isolation transformer, a secondary-side rectification circuit, and a dc output terminal, where:
the three-phase alternating current input end comprises an A-phase alternating current input end, a B-phase alternating current input end and a C-phase alternating current input end;
referring to fig. 2, the primary-side matrix switch circuit includes a primary-side first bridge arm branch, a primary-side second bridge arm branch and a primary-side third bridge arm branch which are connected in parallel, the primary-side first bridge arm branch includes a primary-side first upper bridge arm and a primary-side first lower bridge arm which are connected in series, and the a.c. input end is connected to a connection point of the primary-side first upper bridge and the primary-side first lower bridge arm; the primary side second bridge arm branch comprises a primary side second upper bridge arm and a primary side second bridge arm which are connected in series, and the B alternating current input end is connected to the connecting point of the primary side second upper bridge arm and the primary side second lower bridge arm; the primary side third bridge arm branch comprises a primary side third upper bridge arm and a primary side third lower bridge arm which are connected in series, and the C alternating current input end is connected to the connecting point of the primary side third upper bridge and the primary side third lower bridge arm; referring to fig. 3, the first upper bridge on the primary side, the first lower bridge arm on the primary side, the second upper bridge on the primary side, the second lower bridge arm on the primary side, the third upper bridge on the primary side and the third lower bridge arm on the primary side are all formed by connecting two switching tubes in series in an opposite direction; the switching tube is selected from an IGBT tube or a MOSFET tube, wherein a silicon-based switching device or a silicon carbide-based switching device may be used. When the switching tube is an IGBT tube, the IGBT tube is connected with a freewheeling diode in a reverse parallel mode.
Two ends of a primary winding of the isolation transformer are respectively connected to two parallel connection points of a primary first bridge arm branch, a primary second bridge arm branch and a primary third bridge arm branch; wherein the isolation transformer presents parasitic leakage reactance.
Referring to fig. 2, the secondary rectifying circuit is used for rectifying the electric energy transmitted by the isolation transformer, the input end of the secondary rectifying circuit is connected with the secondary winding of the isolation transformer, and the output end of the secondary rectifying circuit is led out to be used as a direct current output end.
According to the three-phase alternating current-direct current conversion power supply provided by the embodiment of the invention, a set of circuit is used for realizing two functions of three-phase power factor correction and output isolation of a direct current power supply, the conversion power supply adopts a single-stage structure, compared with the existing two-stage scheme of cascading an active power factor correction circuit with an isolation type direct current-direct current conversion circuit, a large-capacitance value direct current capacitor between a rectifier and a direct current-direct current converter can be removed, the size and the weight of the whole conversion power supply are effectively reduced, the power density of the conversion power supply is improved, in addition, in the traditional alternating current-direct current conversion power supply, the service life of the large-capacitance value direct current capacitor is shorter, the component is a short plate of the service life of the whole conversion power supply, the service life of a system can be effectively prolonged by removing the large-capacitance value direct current capacitor, and the. In addition, the IGBT tube or the MOSFET tube of the fully-active switch tube is applied, more control freedom degrees can be given to the power supply, so that the power supply control mode is more flexible and diversified, the switching loss of the system can be effectively reduced through the combination of different switch conduction sequences, and the possibility is provided for realizing the soft switch.
Referring to fig. 3, according to some embodiments of the present invention, the secondary rectifier circuit is a full-bridge rectifier circuit, and includes a secondary first leg branch and a secondary second leg branch that are connected in parallel to each other, the secondary first leg branch includes a secondary first upper leg and a secondary first lower leg that are connected in series to each other, the secondary second leg branch includes a secondary second upper leg and a secondary second lower leg that are connected in series to each other, and both ends of a secondary winding of the isolation transformer are connected to a connection point of the secondary first upper leg and the secondary first lower leg and a connection point of the secondary second upper leg and the secondary second lower leg, respectively; the direct current output end is respectively connected to two parallel connection points of the secondary side first bridge arm branch and the secondary side second bridge arm branch.
Referring to fig. 4, according to some embodiments of the present invention, each of the secondary side first upper leg, the secondary side first lower leg, the secondary side second upper leg, and the secondary side second lower leg includes a plurality of switching tubes connected in parallel with each other. The secondary rectification circuit adopts a mode that a plurality of switching tubes are connected in parallel, so that the conduction loss of the secondary rectification circuit can be effectively reduced, and the conversion efficiency of the system is improved. The switch tube in the secondary side rectifying circuit is an MOSFET tube which can be a silicon device or a wide bandgap semiconductor device, such as silicon carbide or gallium nitride. The secondary side rectifying circuit adopts a plurality of MOSFET tubes to be connected in parallel, gives the MOSFET tube the resistance effect after switching on, compares in uncontrollable diode, can effectively reduce the conduction loss of system, promotes the conversion efficiency of power.
Referring to fig. 4, according to some embodiments of the present invention, a three-phase filter inductor and a three-phase filter capacitor are further disposed between the three-phase ac input terminal and the primary side matrix switch circuit, the three-phase filter inductor includes an a-phase filter inductor, a B-phase filter inductor, and a C-phase filter inductor, the a-phase filter inductor is connected in series between the a-phase ac input terminal and the connection point of the primary side first upper bridge and the primary side first lower bridge arm, the B-phase filter inductor is connected in series between the B-phase ac input terminal and the connection point of the primary side second upper bridge and the primary side second lower bridge arm, the C-phase filter inductor is connected in series between the C-phase ac input terminal and the connection point of the primary side third upper bridge and the primary side third lower bridge arm, the three-phase filter capacitor is composed of three capacitors connected in a delta or star connection manner, the three-phase filter capacitors, The connection point of the primary second upper bridge and the primary second lower bridge arm and the connection point of the primary third upper bridge and the primary third lower bridge arm.
Referring to fig. 4, according to some embodiments of the present invention, the dc filter circuit is disposed between the secondary rectifier circuit and the dc output terminal, the dc filter circuit includes an output dc inductor and an output dc capacitor, one output terminal of the secondary rectifier circuit is connected to one end of the output dc inductor, the other end of the output dc inductor is connected to one end of the output dc capacitor, the other output terminal of the secondary rectifier circuit is connected to the other end of the output dc capacitor, and two ends of the output dc capacitor are led out as the dc output terminal.
According to some embodiments of the present invention, the secondary side rectifying circuit further comprises an additional output dc capacitor disposed between the secondary side rectifying circuit and the dc filter circuit, and two ends of the additional output dc capacitor are connected to two output ends of the secondary side rectifying circuit. By arranging the additional output direct current capacitor, the output voltage range of the three-phase alternating current-direct current conversion power supply can be widened.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. A three-phase ac-dc conversion power supply, comprising:
the three-phase alternating current input end comprises an A alternating current input end, a B alternating current input end and a C alternating current input end;
the primary side matrix type switch circuit comprises a primary side first bridge arm branch, a primary side second bridge arm branch and a primary side third bridge arm branch which are connected in parallel, wherein the primary side first bridge arm branch comprises a primary side first upper bridge arm and a primary side first lower bridge arm which are connected in series, and the A-shaped alternating current input end is connected to the connecting point of the primary side first upper bridge arm and the primary side first lower bridge arm; the primary side second bridge arm branch comprises a primary side second upper bridge arm and a primary side second bridge arm which are connected in series, and the B-phase alternating current input end is connected to the connecting point of the primary side second upper bridge and the primary side second lower bridge arm; the primary side third bridge arm branch comprises a primary side third upper bridge arm and a primary side third lower bridge arm which are connected in series, and the C alternating current input end is connected to the connecting point of the primary side third upper bridge and the primary side third lower bridge arm; the primary side first upper bridge, the primary side first lower bridge arm, the primary side second upper bridge, the primary side second lower bridge arm, the primary side third upper bridge and the primary side third lower bridge arm are all formed by reversely connecting two switching tubes in series;
two ends of a primary winding of the isolation transformer are respectively connected to two parallel connection points of the primary first bridge arm branch, the primary second bridge arm branch and the primary third bridge arm branch;
and the secondary rectifying circuit is used for rectifying the electric energy transmitted by the isolation transformer, the input end of the secondary rectifying circuit is connected with the secondary winding of the isolation transformer, and the output end of the secondary rectifying circuit is led out to be used as a direct current output end.
2. A three-phase ac-dc conversion power supply according to claim 1, wherein the secondary rectifier circuit is a full-bridge rectifier circuit including a secondary first leg branch and a secondary second leg branch connected in parallel, the secondary first leg branch including a secondary first upper leg and a secondary first lower leg connected in series, the secondary second leg branch including a secondary second upper leg and a secondary second lower leg connected in series, and both ends of the secondary winding of the isolation transformer are connected to a connection point of the secondary first upper leg and the secondary first lower leg and a connection point of the secondary second upper leg and the secondary second lower leg, respectively; the direct current output end is respectively connected to two parallel connection points of the secondary side first bridge arm branch and the secondary side second bridge arm branch.
3. The three-phase alternating current-direct current conversion power supply according to claim 2, wherein the secondary side first upper bridge arm, the secondary side first lower bridge arm, the secondary side second upper bridge arm and the secondary side second lower bridge arm each comprise a plurality of switching tubes connected in parallel.
4. The three-phase ac-dc conversion power supply according to claim 1, wherein a three-phase filter inductor and a three-phase filter capacitor are further provided between the three-phase ac input terminal and the primary side matrix switch circuit, the three-phase filter inductor includes an a-phase filter inductor, a B-phase filter inductor, and a C-phase filter inductor, the a-phase filter inductor is connected in series between the a-phase ac input terminal and the connection point of the primary side first upper bridge and the primary side first lower bridge arm, the B-phase filter inductor is connected in series between the B-phase ac input terminal and the connection point of the primary side second upper bridge and the primary side second lower bridge arm, the C-phase filter inductor is connected in series between the C-phase ac input terminal and the connection point of the primary side third upper bridge and the primary side third lower bridge arm, and the three-phase filter capacitor is formed by three capacitors connected in a delta or star configuration, and three ports of the three-phase filter capacitor are respectively connected to a connection point of the primary first upper bridge and the primary first lower bridge arm, a connection point of the primary second upper bridge and the primary second lower bridge arm, and a connection point of the primary third upper bridge and the primary third lower bridge arm.
5. A three-phase ac-dc conversion power supply according to claim 1, further comprising a dc filter circuit disposed between the secondary rectifier circuit and the dc output terminal, wherein the dc filter circuit includes an output dc inductor and an output dc capacitor, one output terminal of the secondary rectifier circuit is connected to one end of the output dc inductor, the other end of the output dc inductor is connected to one end of the output dc capacitor, the other output terminal of the secondary rectifier circuit is connected to the other end of the output dc capacitor, and both ends of the output dc capacitor are led out as dc output terminals.
6. The three-phase ac-dc conversion power supply according to claim 5, further comprising an additional output dc capacitor disposed between said secondary rectification circuit and said dc filter circuit, wherein two ends of said additional output dc capacitor are connected to two output ends of said secondary rectification circuit.
7. The three-phase ac-dc conversion power supply according to claim 1, wherein the switching tubes in the primary matrix switching circuit are IGBT tubes or MOSFET tubes.
8. The three-phase AC-DC conversion power supply according to claim 3, wherein the switching tube of the secondary rectification circuit is a MOSFET tube.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911317001.8A CN110932577A (en) | 2019-12-19 | 2019-12-19 | Three-phase AC-DC conversion power supply |
| CN202211694219.7A CN116111863A (en) | 2019-12-19 | 2019-12-19 | Three-phase AC-DC conversion power supply |
| PCT/CN2020/071376 WO2021120354A1 (en) | 2019-12-19 | 2020-01-10 | Three-phase ac-dc conversion power source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911317001.8A CN110932577A (en) | 2019-12-19 | 2019-12-19 | Three-phase AC-DC conversion power supply |
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| CN202211694219.7A Division CN116111863A (en) | 2019-12-19 | 2019-12-19 | Three-phase AC-DC conversion power supply |
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| CN110932577A true CN110932577A (en) | 2020-03-27 |
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| CN202211694219.7A Pending CN116111863A (en) | 2019-12-19 | 2019-12-19 | Three-phase AC-DC conversion power supply |
| CN201911317001.8A Pending CN110932577A (en) | 2019-12-19 | 2019-12-19 | Three-phase AC-DC conversion power supply |
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| WO (1) | WO2021120354A1 (en) |
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| CN108028607B (en) * | 2015-09-18 | 2020-04-14 | 株式会社村田制作所 | Three-phase rectification converter PWM scheme based on space vector modulation |
| US10873265B2 (en) * | 2018-06-12 | 2020-12-22 | Virginia Tech Intellectual Properties, Inc. | Bidirectional three-phase direct current (DC)/DC converters |
| CN109787493B (en) * | 2019-03-26 | 2020-10-16 | 哈工大（张家口）工业技术研究院 | Double-period current decoupling modulation method of three-phase single-stage AC-DC converter |
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- 2019-12-19 CN CN202211694219.7A patent/CN116111863A/en active Pending
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| WO2021120354A1 (en) | 2021-06-24 |
| CN116111863A (en) | 2023-05-12 |
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